ObGyn Intelligence

ObGyn Intelligence

The Due Date: The Most Important Number in Pregnancy

The Obstetric Intellect: In 1812, Franz Karl Naegele, a professor of obstetrics at Heidelberg, proposed a simple method to estimate when a baby would be born.

Amos Grünebaum, MD's avatar
Amos Grünebaum, MD
Oct 09, 2025
∙ Paid

Every pregnancy revolves around a single date—the due date.
It dictates when ultrasounds are done, when screenings are interpreted, when labor is “post-term,” and when an induction is “elective.”

Here are other important aspects of pregnancy that revolve around a single date — the due date (EDD):

  1. Timing of Ultrasound Scans – The gestational age determines …

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